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olga_2 [115]
4 years ago
10

The term solstice translates as "Sun stop." Explain why this translation makes sense from an astronomical point of view. It make

s sense because on that day the Sun ...
Physics
2 answers:
adoni [48]4 years ago
4 0

Answer:

It makes sense because on that the day  the sun stops moving northward and starts moving southward

Explanation:

JulijaS [17]4 years ago
4 0

Answer:

Explanation:

Solstice is gotten from the Latin word 'solstitium'. 'sol' means the sun and 'sistere' means 'to cause to stand or stand still'. From an astronomical point of view, this translation makes sense because this term is used to describe that particular instance when the sun attains its maximum northern point or maximum southern point from the equator of the earth.

When the sun attains northernmost point from the equator, summer solstice occurs and consequently causing the Earth to experience the longest day of the year. Similarly, when the sun attains its southernmost point from the equator, the Earth's proximity to the sun is at its closest and thereby making the Earth to experience the shortest day of the year. Astronomically, this is known as the winter solstice

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A penny dropped into a wishing well reaches the bottom in 2.50 seconds. What was the velocity at impact?
12345 [234]

Answer:

Taking it was dropped with inital velocity of 0m/s.

v = u+at

v = 0 + 9.8*1.5

v = 14.7s

(a=9.8m/s^2 << That's the acceleration due to gravity)

Explanation:

4 0
4 years ago
Read 2 more answers
An electron (charge −e=−1.60×10−19C−e=−1.60×10−19C) is at rest at a distance 1.00×10−10 m 1.00×10−10m from the center of a nucle
shtirl [24]

Answer:

-9.45\times10^{-16} \text{ J}

Explanation:

According to Coulomb's law, the force of attraction between two point charges, q_1 and q_2, separated by a distance d is given by

F = k\dfrac{q_1q_2}{d^2}

k is a constant with a value of 9\times10^9\text{ F/m}.

When we substitute the values from the question,

F = (9\times10^9\text{ F/m})\dfrac{(-1.60\times10^{-19} \text{ C})\times(+1.31\times10^{-17}\text{ C})}{(1.00\times10^{-10}\text{ m})^2} = -1.89\times10^{-6} \text{ N}

This value is negative because it is in a direction towards the positive charge.

The work done in moving the electron from the nucleus is

W = F\times r

W = (-1.89\times 10^{-6} \text{ N})\times(5.00\times10^{-10}\text{ m}) = -9.45\times10^{-16} \text{ J}

This is negative because work is done on the electron, not by it.

3 0
3 years ago
A horizontal 791-N merry-go-round is a solid disk of radius 1.56 m and is started from rest by a constant horizontal force of 49
ICE Princess25 [194]

Answer:

K.E=273.5J

Explanation:

Given data

F_{g}=791N\\F_{h}=49N\\r=1.56m\\t=3.03s

To find

Kinetic Energy

Solution

The moment of inertia is given as:

I=(\frac{1}{2} )MR^2\\I=\frac{1}{2}(F_{g}/g)R^2\\ I=\frac{1}{2}(\frac{791N}{9.8m/s^2} )(1.56m)^2\\ I=98.21kg.m^2

The angular acceleration is given as:

\alpha =\frac{T}{I}\\\alpha  =\frac{F_{y}R}{I}\\ \alpha =\frac{(49N)(1.56m)}{98.2kg.m^2}\\\alpha  =0.778rad/s^2

Now the angular velocity is given by:

w=\alpha t\\w=(0.778rad/s^2)(3.03s)\\w=2.36rad/s

So the kinetic energy given as:

K.E=(\frac{1}{2} )Iw^2\\K.E=\frac{1}{2}(98.21kg.m^2)(2.36rad/s)^2\\ K.E=273.5J

8 0
3 years ago
Tar is hard to pour because it doesn’t flow easily
IgorC [24]

tar is very thick and viscous making it difficult to pour when cold which is why it's heated to extremely high temperatures when blacktop is being poured

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A textbook is sitting at rest on a desk. Compared to the magnitude of the force of the textbook on the desk, how
crimeas [40]
Equal because the book is not moving and the forces are balanced/equal
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